Crystal Unit is a generic term used in place of the more complete expression "piezoelectric quartz crystal unit." A crystal unit is a complete assembly, consisting of a tuned quartz resonator with electrodes, a holder with suitable mounting structures in a permanently hermetically sealed package
A crystal oscillator is a hybrid electronic component that combines a crystal and an oscillation circuitry into one package to generate a clock signal.
Crystal oscillators serve as stable frequency references for a broad range of communication equipment and microprocessor / microcontroller applications.
Micro Crystal’s family of Real Time Clocks (RTCs) combine the 32.768kHz tuning-fork crystal together with the CMOS based oscillator circuitry in a miniature, RoHS compliant Ceramic-Package!
C2 package: 5.0 x 3.2 mm
C3 package: 3.7 x 2.5 mm
C7 package: 3.2 x 1.5 mm, world smallest RTC
Each of below products is dedicated to address market’s request for high accuracy, temperature compensation, low cost, low current consumption, miniature packaging and automotive qualification according to AEC-Q200.
There are a range of outstanding products available for standard Interfaces like I2C and SPI in 4-wire and 3-wire mode, incl. world’s lowest current consumption of 130nA and the smallest package C7 with the dimension of 3.2 x 1.5mm.